Because what the Bible calls miracles is basically illusions and trickery.
Competition for same customers is bad for business.
:D:D:D:D:D:D:D
Witchcraft is demonic. Same with sorcery.
It’s widely known that some people use dark magic to kill other human beings, spread mysterious illness, and frustrate personal development
Also, Jesus Christ became the last blood sacrifice when He died on the cross. Demons, on the other hand require blood covenants that are achieved through animal/human sacrifice